/*
Copyright 2022 The KubeEdge Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package v1alpha2

import (
	"fmt"
	"os"

	"sigs.k8s.io/yaml"
)

// Parse reads config file and converts YAML to EdgeCoreConfig
func (c *EdgeCoreConfig) Parse(filename string) error {
	data, err := os.ReadFile(filename)
	if err != nil {
		return fmt.Errorf("failed to read configfile %s, err: %v", filename, err)
	}
	err = yaml.Unmarshal(data, c)
	if err != nil {
		return fmt.Errorf("failed to unmarshal configfile %s, err: %v", filename, err)
	}
	return nil
}

// WriteTo converts EdgeCoreConfig to yaml and write it to the file
func (c *EdgeCoreConfig) WriteTo(filename string) error {
	data, err := yaml.Marshal(c)
	if err != nil {
		return err
	}
	fileInfo, err := os.Stat(filename)
	if err != nil {
		// If the file does not exist, the default permissions are 0644.
		return os.WriteFile(filename, data, 0644)
	}
	// Write the file using the original file permissions.
	return os.WriteFile(filename, data, fileInfo.Mode())
}
